Removing a tag when another one is manually added


I’m trying to figure out if it’s possible to make a tag-flow that removes one tag when another tag is manually added to a file.

I have file retention set to delete files after 60 days, and the tag used to purge the files is added on upload. What I’d like to do is have a “do not remove”-tag that when added removes the “auto purge”-tag.

Is this doable?